Q. Solve for x.(x−6)(x+6)<0Write a compound inequality like 1<x<3 or like x<1 or x>3.
Plot Zeros and Test Intervals: Plot the zeros on a number line and test the intervals. The intervals are (−∞,−6), (−6,6), and (6,∞).
Test Interval (−∞,−6): Test the interval (−∞,−6) by picking a number less than −6, say −7.(−7−6)(−7+6)=(−13)(−1)=13, which is positive.
Test Interval (−6,6): Test the interval (−6,6) by picking a number between −6 and 6, say 0.(0−6)(0+6)=(−6)(6)=−36, which is negative.
Test Interval 6,∞):</b>Testtheinterval$6,∞)bypickinganumbergreaterthan$6, say 7.(7−6)(7+6)=(1)(13)=13, which is positive.
Identify Negative Product Interval: Since we want (x - 6)(x + 6) < 0, the solution is the interval where the product is negative.The product is negative in the interval (−6,6).
Write Compound Inequality: Write the solution as a compound inequality. -6 < x < 6.